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<s> Chọn đáp án đúng với câu hỏi: Find one error in each of the following sentences (A, B, C or D) Onyx is a mineral that can be recognized its regular and straight parallel bands of white, black or brown.
A. recognized its
B. straight parallel
C. of
D. or Đáp án là: C. of </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một hình chữ nhật có chiều dài 30m, chiều rộng 15m. Chu vi của hình chữ nhật đó là:
A. 80 m
B. 70 m
C. 60 m
D. 90 m Đáp án là: D. 90 m </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho áp kế như hình vẽ. Tiết diện ống là 0,1cm 2, biết ở 0 0 C giọt thủy ngân cách A 30cm, ở 5 0 C giọt thủy ngân cách A 50cm. Thể tích của bình là:
A. 106,2cm 3
B. 106,5cm 3
C. 130cm 3
D. 250cm 3 Đáp án là: A. 106,2cm 3 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: California attracted people from many countries when gold was discovered in 1848.
A. Discovered in 1848, gold was attractive to people in California.
B. Discovered in California in 1848, gold attracted people from many countries there.
C. Gold in California was discovered in 1848 after... | [
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<s> Chọn đáp án đúng với câu hỏi: Đun nóng hỗn hợp X gồm C 3 H 4, C 3 H 6 và H 2 có Ni xúc tác thu được 0,224 lít (đktc) hỗn hợp khí Y có tỷ khối so với H 2 bằng 8,35. Mặt khác, nếu đốt cháy hoàn toàn hỗn hợp X rồi hấp thụ hết sản phẩm cháy vào 400 ml dung dịch Ca(... | [
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<s> Chọn đáp án đúng với câu hỏi: Sự kiện nào diễn ra ngày 11/09/2001 khiến Mĩ phải thay đổi chính sách đối nội và đối ngoại khi bước vào thế kỉ XXI?
A. sự xuất hiện và hoạt động của chủ nghĩa khủng bố
B. chiến tranh và xung đột diễn ra ở nhiều khu vực trên t... | [
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<s> Chọn đáp án đúng với câu hỏi: Cho hàm số f(x)=x^3-3x^2. Tính tổng tất cả các giá trị nguyên của m để đồ thị hàm số g(x)=f((x))+m cắt trục hoành tại 4 điểm phân biệt.
A. 3
B. 10
C. 4
D. 6 Đáp án là: D. 6 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.
A. finger s.
B. attack s.
C. medal s.
D. concern s. Đáp án là: B. attack s. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Dẫn V lít (ở đktc) hh X gồm axetilen và hiđro đi qua ống sứ đựng bột niken nung nóng, thu được khí Y. Dẫn Y vào lượng dư AgNO 3 trong dd NH 3 thu được 12 gam kết tủa. Khí đi ra khỏi dung dịch phản ứng vừa đủ với 16 gam brom và còn lại khi... | [
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<s> Chọn đáp án đúng với câu hỏi: Hấp thụ hoàn toàn 12 gam lưu huỳnh trioxit vào 100 gam nước. Nồng độ phần trăm của dung dịch thu được là (S = 32, O = 16, H = 1)
A. 12,00%
B. 10,71%
C. 13,13%
D. 14,7% Đáp án là: C. 13,13% </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Phát biểu nào sau đây là đúng?
A. Trong hợp chất, tất cả các kim loại kiềm đều có số oxi hóa +1.
B. Trong nhóm IA, tính khử của các kim loại giảm dần từ Li đến Cs.
C. Tất cả các hiđroxit của kim loại nhóm IIA đều dễ tan trong nước.
D.... | [
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<s> Chọn đáp án đúng với câu hỏi: Có 3 viên bi màu xanh và 7 viên bi màu đỏ. Vậy tỉ số của số viên bi màu xanh so với viên bi màu đỏ là
A. 3/10
B. 7/10
C. 3/7
D. 7/3 Đáp án là: A. 3/10 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Find the word which has a different sound in the part underlined
A. l a yer
B. fr a me
C. artis a n
D. pl a ce Đáp án là: C. artis a n </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Chất nào sau đây không có khả năng tẩy màu?
A. Dung dịch nước Javen
B. Dung dịch nước Clo
C. Clorua vôi CaOCl 2
D. Dung dịch kali clorat KClO 3 Đáp án là: D. Dung dịch kali clorat KClO 3 </s> | [
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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<s> Chọn đáp án đúng với câu hỏi: Căn cứ vào Atlat Địa lí Việt Nam trang 28, cho biết các khu kinh tế ven biển ở Duyên hải Nam Trung Bộ được nối với nhau bởi tuyến đường nào sau đây?
A. Quốc lộ 1.
B. Quốc lộ 24.
C. Quốc lộ 25.
D. Quốc lộ 27. Đáp án là: A. Quốc lộ... | [
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2... | [
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1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Được phát hiện vào năm 1989 nhưng phải đến năm bao nhiêu hang Sơn Đoòng mới được giới thiệu lần đầu tiên?
A. 2007
B. 2008
C. 2009
D. 2010 Đáp án là: C. 2009 </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Điện phân (với điện cực trơ, màng ngăn) dung dịch chứa hỗn hợp C u S O 4 và NaCl (trong đó số mol NaCl gấp 4 lần số mol C u S O 4 ) bằng dòng điện một chiều có cường độ ổn định. Sau t (h), thu được dung dịch X và sau 2t (h), thu đươ... | [
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347,
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31500,
29876,
31... | [
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1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Điện phân 200ml NaCl 1 M, KOH 2M bằng đ iện cực trơ, màng ngăn xốp, khi th ể tích khí bên anot lớn hơn 2,24 lít thì ngừng điện phân. Hòa tan hoàn toàn m gam Al, Zn t ỉ lệ mo l 1:1 vào dung dịch sau điện phân. Giá trị lớn nhất của m là
A. ... | [
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29... | [
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1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Trong thí nghiệm khe I-âng về giao thoa ánh sáng, hai khe được chiếu bởi ánh sáng trắng có bước sóng từ 390nm đến 760nm. Khoảng cách giữa hai khe là 1mm, khoảng cách từ mặt phẳng chứa hai khe đến màn quan sát là 2m. Trên màn, khoảng ca... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Cho các muối nitrat: NaNO 3, Cu NO 3 2, Mg NO 3 2, Fe NO 3 3, AgNO 3, KNO 3, Pb NO 3 2, Al NO 3 3. Có bao nhiêu muối nitrat khi bị nhiệt phân sinh ra oxit kim loại, NO 2 và O 2?
A. 2
B. 3
C. 4
D. 5 Đáp án là: D. 5 </s> | [
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3... | [
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<s> Chọn đáp án đúng với câu hỏi: Trong các chất sau, chất dùng để làm mềm nước cứng có tính cứng vĩnh cửu là.
A. NaCl
B. B a C l 2
C. C a O H 2
D. N a 3 P O 4 Đáp án là: D. N a 3 P O 4 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đâu không phải là điểm chung trong nguyên tắc hoạt động của tổ chức ASEAN và Liên hợp quốc?
A. Không can thiệp vào công việc nội bộ của bất kì nước nào.
B. Giải quyết các tranh chấp bằng phương pháp hòa bình.
C. Hợp tác phát tr... | [
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<s> Chọn đáp án đúng với câu hỏi: I'm not familiar_______ that song.
A. to
B. of
C. with
D. about Đáp án là: C. with </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Ưu điểm của công nghệ phản biệt hóa tế bào sinh dưỡng thành tế bào gốc để tái tạo các mô, cơ quan tự thân nhằm thay thế mô, cơ quan bị tổn thương ở người bệnh là
A. giúp chủ động được nguồn mô, cơ quan cấy ghép.
B. giúp... | [
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<s> Chọn đáp án đúng với câu hỏi: R ễ cây hấp th ụ nito khoáng dướ i d ạng nào sau đây?
A. NO3-, NH4+
B. NH4+, N2
C. NO3-, NO2-
D. NH4+, NO2- Đáp án là: A. NO3-, NH4+ </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Nhận định nào dưới đây không đúng về cơ cấu kinh tế?
A. Việc xác định đúng cơ cấu kinh tế có ý nghĩa quan trọng đối với mỗi quốc gia.
B. Trong các bộ phận hợp thành cơ cấu kinh tế, cơ cấu ngành có vai trò quan trọng.
C. Cơ câ... | [
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<s> Chọn đáp án đúng với câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position ofprimary stress in each of the following questions.
A. enterprise
B. prevention
C. fertilize
D. implement Đáp án là: B. prevention </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Kết quả kì cuối của giảm phân II các NST nằm gọn trong nhân với số lượng
A. 2n đơn
B. n đơn
C. n kép
D. 2n kép Đáp án là: B. n đơn </s> | [
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
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1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Điều kiện để 1 vật dẫn điện là
A. vật phải ở nhiệt độ phòng
B. có chứa các điện tích tự do
C. vật nhất thiết phải làm bằng kim loại
D. vật phải mang điện tích Đáp án là: B. có chứa các điện tích tự do </s> | [
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Các electron của nguyên tử nguyên tố R được phân bố trên 4 lớp, lớp ngoài cùng có 2 electron, số phân lớp có chứa electron của R là 6. Số đơn vị điện tích hạt nhân nguyên tử của nguyên tố R có thể là giá trị nào
A. 19.
B. 34.
C. 28... | [
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865,
325,
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274,
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298,
228,
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29901,
9243,
30103,
29883,
11966,
2723,
207,
140,
29874,
302,
2543,
4099,
... | [
1,
1,
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Tính từ “chế nhạo, mỉa mai” trong tiếng Anh là từ gì?
A. rude
B. sarcastic
C. marvelous
D. social Đáp án là: B. sarcastic </s> | [
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1,
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1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Một cuộn dây dẫn điện trở không đáng kể được cuộn lại và nối vào mạng điện xoay chiều 127 V – 50 Hz. Dòng điện cực đại qua nó bằng 10 A. Độ tự cảm của cuộn dây là
A. 0,04 (H).
B. 0,08 (H).
C. 0,057 (H).
D. 0,114 (H). Đáp án là: C. 0,057 ... | [
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31... | [
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Người ta chọn một số điện trở loại 2 Ω và 3 Ω để nối tiếp thành đoạn mạch có điện trở tổng cộng là 12 Ω. Có bao nhiêu phương án lựa chọn để thực hiện yêu cầu trên?
A. 2 phương án.
B. 3 phương án.
C. 4 phương án.
D. 5 phương ... | [
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405,
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207,
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29875,
11062,
3060,
31... | [
1,
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1,
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1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate t he word that differs from the other three in the position of primary stress in each of the following questions.
A. guidance
B. reserve
C. prospect
D. species Đáp án là: B. reserve </s> | [
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278,
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350,
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315,
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470,
360,
373,... | [
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1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Một gen có chiều dài 408 nm và số nuclêôtit loại A chiếm 20% tổng số nuclêôtit một của gen. Trên mạch 1 của gen có 200T và số nuclêôtit loại G chiếm 15% tổng số nuclêôtit của mạch. Có bao nhiêu phát biểu sau đây đúng? I. Tỉ lệ G 1 A ... | [
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865,
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4546,
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29873,
2531,
1302,
30103,
521,
347,
31500,
30712,... | [
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Biểu hiện nào sau đây là của toàn cầu hóa kinh tế?
A. Thị trường tài chính quốc tế thu hẹp.
B. Các giao dịch quốc tế về thương mại bị hạn chế.
C. Các tiêu chuẩn toàn cầu được áp dụng rộng rãi.
D. Vai trò của các công ty đa quô... | [
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10... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Giai cấp đóng vai trò chủ đạo trong nền sản xuất xã hội ở phương Tây cổ đại là
A. chủ nô
B. nô lệ
C. dân tự do
D. kiều dân Đáp án là: B. nô lệ </s> | [
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86... | [
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Khi điện phân NaCl nóng chảy (điện cực trơ), tại catot xảy ra:
A. Sự khử ion Cl -
B. Sự khử ion Na +
C. Sự oxi hóa ion Cl -
D. Sự oxi hóa ion Na + Đáp án là: B. Sự khử ion Na + </s> | [
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1,
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1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Hãy kết nối nội dung ở cột bên trái với cột bên phải cho phù hợp về sự hình thành các quốc gia cổ đại ở phương Đông. 1. Sông Nin 2. Hoàng Hà, Trường Giang 3. Sông Tigơrơ và Ơphơrát 4. Sông Ấn, sông Hằng A, Ấn Độ B, Lưỡng ... | [
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298... | [
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1,
1,
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1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions. Lucy has just finished her A-levels and she has got a place at university, but she would really like a break from the academic wor... | [
1,
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865,
325,
31280,
29875,
274,
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29884,
298,
228,
190,
146,
29875,
29901,
4485,
278,
5497,
319,
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350,
29892,
315,
29892,
470,
360,
373,... | [
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1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Trong bình cộng của ba số: 72; 234 ; 210 là :
A. 127
B. 172
C. 271
D. 258 Đáp án là: B. 172 </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Which of these things would a physicist probably NOT study?
A. Energy
B. Lions
C. Atoms
D. Stars Đáp án là: B. Lions </s> | [
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4824,
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391,
3117,
6058,
6559,
... | [
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<s> Chọn đáp án đúng với câu hỏi: Văn bản nhật dụng nào viết về vẻ đẹp của sinh hoạt văn hóa dân tộc?
A. Bức thư của thủ lĩnh da đỏ
B. Ca Huế trên sông Hương
C. Cổng trường mở ra
D. Mẹ tôi Đáp án là: B. Ca Huế trên sông Hương </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Trong chân không, ánh sáng nhìn thấy có bước sóng trong khoảng:
A. Từ vài nanômét đến 380 nm.
B. từ 380 nm đến 760 nm.
C. từ 10 12 m đến 10 − 9 m.
D. từ 760 nm đến vài milimét. Đáp án là: B. từ 380 nm đến 760 nm. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Các đới gió trên Trái Đất từ Xích đạo về cực theo thứ tự nào sau đây?
A. Gió Đông cực, gió Mậu dịch, gió Tây ôn đới.
B. Gió Tây ôn đới, gió Đông cực, gió Mậu dịch.
C. Gió Mậu dịch, gió Tây ôn đới, gió Đông cực.
D. Gió Mậu ... | [
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<s> Chọn đáp án đúng với câu hỏi: The word “ they ” in the last paragraph refers to_______________
A. workings of govemments
B. newest filmmakers
C. political problems
D. high school students Đáp án là: D. high school students </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Dẫn 0,02 mol hỗn hợp X (gồm hơi nước và khí CO 2 ) qua cacbon nung đỏ, thu được 0,035 mol hỗn hợp Y gồm CO, H 2 và CO 2. Cho Y đi qua ống đựng 10 gam hỗn hợp gồm Fe 2 O 3 và CuO (dư, nung nóng), sau khi các phản ứng xảy ra hoàn toàn, thu đư... | [
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5... | [
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<s> Chọn đáp án đúng với câu hỏi: It’s one of the worst books I’ve ever read. Its only redeeming ___________ is that it’s quite short.
A. aspect
B. element
C. feature
D. factor Đáp án là: C. feature </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Muốn cho một vật có trục quay cố đinh nằm cân bằng thì
A. tổng mômen của các lực có khuynh hướng làm vật quay theo một chiều phải bằng tổng mômen của các lực có khuynh hướng làm vật quay theo chiều ngược lại.
B. tổng mômen củ... | [
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<s> Chọn đáp án đúng với câu hỏi: Con báo đốm cân nặng 72kg. Hổ nặng hơn báo 215kg. Cân nặng của hổ là:
A. 215kg
B. 288kg
C. 935kg
D. 287kg Đáp án là: D. 287kg </s> | [
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<s> Chọn đáp án đúng với câu hỏi: This type of study was formerly restricted to book-based learning and (3)________ course but now includes courses on TV, CD-ROM or the Internet, and self-access courses at language or computer centers.
A. corresponding
B. corresponded
C. correspondent
D. correspondence Đáp án là: D. co... | [
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<s> Chọn đáp án đúng với câu hỏi: Điện phân với hai điện cực trơ 200 ml dung dịch chứa hỗn hợp NaCl 1,2 M và CuSO 4 1M trong thời gian t giây, I = 5A thì thu được dung dịch X và V lít hỗn hợp khí Y ở anot (đktc). Nhúng một thanh sắt vào X đến khi phản ứng xảy ra hoàn toà... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Cho 2,94 gam H 2 NC 3 H 5 (COOH) 2 (axit glutamic) vào 160ml dung dịch HCl 0,25M, thu được dung dịch X. Cho X tác dụng với 200ml dung dịch NaOH 0,5M, thu được dung dịch Y. Cô cạn Y, thu được m gam chất rắn khan. Giá trị của m là
A. 6,16
B. 6,96
C. 7,00
D. 6,... | [
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<s> Chọn đáp án đúng với câu hỏi: Cho hiđrocacbon X phản ứng với brom (trong dung dịch) theo tỉ lệ mol 1:1, thu được chất hữu cơ Y (chứa 74,08% Br về khối lượng). Khi X phản ứng với HBr thì thu được 2 sản phẩm hữu cơ khác nhau. Tên gọi của X là
A. But-1-en
B. But-2-en
C. Pr... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Cho các phản ứng sau: (1) MgSO 4 + BaCl 2 ; (2) CuSO 4 + Ba(OH) 2 ; (3) H 2 SO 4 + BaCO 3 ; (4) H 2 SO 4 + BaCl 2 ; (5) (NH 4 ) 2 SO 4 + Ba(OH) 2 ; (6) Fe 2 (SO 4 ) 3 + Ba(NO 3 ) 2 ; Số phản ứng có cùng một phương trình ion rút gọn Ba 2+ + SO 4 2- → BaSO 4 là
A. 5.
B... | [
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1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Đốt cháy hoàn toàn một amin đơn chức thì thu được CO 2 và nước theo tỉ lệ mol n CO2 : n H2 O = 8 : 9. CTPT của amin là
A. C 4 H 8 N.
B. C 3 H 7 N
C. C 3 H 6 N.
D. C 4 H 9 N. Đáp án là: D. C 4 H 9 N </s> | [
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<s> Chọn đáp án đúng với câu hỏi: “I read your diary,” Nam said to me.
A. Nam refused to read my diary.
B. Nam admitted reading my diary.
C. Nam threatened to read my diary.
D. Nam denied reading my diary. Đáp án là: B. Nam admitted reading my diary. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho điểm \[A\left( {1;12} \right).\] Gọi \[A' = {D_{Ox}}\left( A \right)\] khi đó tọa độ điểm \[A'\] là
A. \[A'\left( { - 1;12} \right)\]
B. \[A'\left( {12;1} \right)\]
C. \[A'\left( {1; - 12} \right)\]
D. Kết quả khác Đáp án là: C. \[A'\left( {1; - 12} \right)\] </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Hỗn hợp X gồm 2 este đơn chức. Cho 0,5 mol X tác dụng với dung dịch AgNO 3 /NH 3 dư thu được 43,2 gam Ag. Cho 14,08 gam X tác dụng với dung dịch KOH vừa đủ thu được hỗn hợp 2 muối của 2 axit đồng đẳng liên tiếp và 8,256 gam hỗn hợp 2 anco... | [
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<s> Chọn đáp án đúng với câu hỏi: Thả cho một proton không vận tốc ban đầu trong một điện trường (bỏ qua tác dụng của trường hấp dẫn) thì nó sẽ
A. Chuyển động ngược hướng với hướng của đường sức của điện trường.
B. Chuyển động từ nơi có điện thế cao ... | [
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<s> Chọn đáp án đúng với câu hỏi: Việc hình thành các cánh đồng lớn trong sản xuất nông nghiệp nhằm mục đích chủ yếu nào sau đây?
A. Tăng quy mô sản xuất, đáp ứng nhu cầu về nông sản.
B. Góp phần nâng cao hiệu quả sản xuất nông nghiệp.
C. Tăng hiệu quả sản xuất... | [
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<s> Chọn đáp án đúng với câu hỏi: Tuyến nội tiết nào dưới đây nằm ở phần đầu?
A. Tuyến tuỵ
B. Tuyến cận giáp
C. Tuyến tùng
D. Tuyến trên thận Đáp án là: C. Tuyến tùng </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đặt vào hai đầu đoạn mạch chỉ chứa cuộn dây thuần cảm có độ tự cảm L một điện áp có biểu thức u = U 0 cos(ωt + φ). Cường độ dòng điện hiệu dụng chạy trong mạch là
A. U 0 L ω
B. U 0 L ω 2
C. U 0 2 L ω
D. U 0 2 L ω Đáp án là: C. U 0 2 L ω </s... | [
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<s> Chọn đáp án đúng với câu hỏi: Đặt vào hai đầu điện trở R = 5 W một hiệu điện thế không đổi U = 20V. Tìm công suất tiêu thụ của điện trở?
A. 40 W
B. 80W
C. 20W
D. 100 W Đáp án là: B. 80W </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Địa hình núi nước ta được chia thành bốn vùng là
A. Đông Bắc, Đông Nam, Tây Bắc, Tây Nam.
B. Hoàng Liên Sơn, Trường Sơn Bắc, Trường Sơn Nam, Tây Bắc.
C. Đông Bắc, Tây Bắc, Trường Sơn Bắc, Trường Sơn Nam.
D. Hoàng Liên Sơn, Tây B... | [
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<s> Chọn đáp án đúng với câu hỏi: Từ thông qua một khung dây biến thiên theo thời gian biểu diễn như hình vẽ. Độ lớn suất điện động cảm ứng trong khung trong khoảng thời gian nào sau đây là đúng?
A. Từ 0 s đến 0,1 s là 4 V
B. Từ 0,1 s đến 0,2 s là 3 V
C. Từ 0,2 s đến ... | [
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<s> Chọn đáp án đúng với câu hỏi: What can be inferred from the passage about the fossils mentioned in lines 17-20?
A. They have not been helpful in understanding the evolution of terrestrial life.
B. They were found in approximately the same numbers as vascular plant fossils.
C. They are older than the mega fossils.
D... | [
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<s> Chọn đáp án đúng với câu hỏi: M ột mạch điện xoay chiều gồm một điện trở thuần R = 40Ω, một cuộn thuần cảm có độ tự cảm 1/π H và một tụ điện có điện dung 1000/7π μF mắc nối tiếp với nhau. Tần số dòng điện 50 Hz. Tính tổng trở của mạch điện.
A. 50Ω
B. 20... | [
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<s> Chọn đáp án đúng với câu hỏi: Một loại quặng photphat dùng để làm phân bón có chứa 35% Ca 3 (PO 4 ) 2 về khối lượng, còn lại là các chất không chứa photpho. Độ dinh dưỡng của loại phân lân này là
A. 7%.
B. 16,03%.
C. 25%.
D. 35%. Đáp án là: B. 16,03%. </s> | [
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3121... | [
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<s> Chọn đáp án đúng với câu hỏi: Trong “Việt Nam hóa chỉến tranh”, lực lượng nào là chủ yếu đế tiến hành chiến tranh?
A. Quân đội Mĩ.
B. Quân đội ngụy
C. Quân đội Mĩ và các đồng minh
D. Quân đội Mĩ và quân đội ngụy Đáp án là: B. Quân đội ngụy </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Lớp nghìn của số 688095 gồm các chữ số
A. 6, 8, 0
B. 0, 9, 5
C. 6, 8, 9
D. 6, 8, 8 Đáp án là: D. 6, 8, 8 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cách nào sau đây có thể làm thước nhựa nhiễm điện?
A. Đưa thước nhựa chạm vào cực dương của nguồn điện
B. Hơ nóng thước nhựa
C. Cọ xát thước nhựa vào vải khô
D. Phơi thước nhựa ở ngoài nắng Đáp án là: C. Cọ xát thước nhu... | [
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<s> Chọn đáp án đúng với câu hỏi: Một loại phân kali chứa 59,6% KCl, 34,5% K 2 CO 3 về khối lượng, còn lại là SiO 2. Độ dinh dưỡng của loại phân này là:
A. 61,10.
B. 49,35.
C. 50,70.
D. 60,20. Đáp án là: A. 61,10. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: My boss asked his son ___________ impolitely.
A. didn’t behave
B. to behave
C. not behave
D. not to behave Đáp án là: C. not behave </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Kim loại nào sau đây tác dụng với dung dịch FeCl 3 nhưng không tác dụng với dung dịch HCl?
A. Fe
B. Al
C. Ag
D. Cu Đáp án là: D. Cu </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Phát biểu nào sau đây không đúng về kim loại kiềm?
A. Nhiệt độ nóng chảy và nhiệt độ sôi thấp
B. Khối lượng riêng nhỏ
C. Độ cứng thấp
D. Độ dẫn điện cao hơn sắt Đáp án là: D. Độ dẫn điện cao hơn sắt </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một trong “tứ đại danh tác” của văn học Trung Quốc thời phong kiến là
A. Tiểu thuyết “Tay du kí”.
B. Bài thơ “Tĩnh dạ tứ”.
C. Vở kịch “Tây Sương Kí”.
D. Vở kịch “Đậu Nga oan”. Đáp án là: C. Vở kịch “Tây Sương Kí”. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Các tần số có thể tạo sóng dừng trên sợi dây hai đầu cố định theo thứ tự tăng dần là f 1, f 2, f 3, f 4,...Tỉ số hai tần số liên tiếp bằng tỉ số
A. hai số nguyên liên tiếp
B. tỉ số hai số nguyên lẻ liên tiếp.
C. tỉ số hai n... | [
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<s> Chọn đáp án đúng với câu hỏi: Xét đường đi của tia sáng qua thấu kính, thấu kính ở hình nào là thấu kính phân kì?
A. hình a.
B. hình b.
C. hình c.
D. hình d. Đáp án là: D. hình d </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tom likes. He spends lots of hours watching the birds.
A. bird-watching
B. bird-watch
C. watch-bird
D. watching-bird Đáp án là: A. bird-watching </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trên nước ta, nghề muối phát triển mạnh nhất ở
A. Bắc Trung Bộ
B. Đồng bằng sông Cửu Long
C. Đông Nam Bộ
D. Duyên hải Nam Trung Bộ Đáp án là: D. Duyên hải Nam Trung Bộ </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Mối quan hệ giữa các thành phần trong lớp vỏ địa lí thường không có đặc điểm nào sau đây?
A. Xâm nhập và tác động lẫn nhau.
B. Phụ thuộc và quy định lẫn nhau.
C. Trao đổi vật chất và năng lượng với nhau.
D. Tồn tại và phát tri... | [
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<s> Chọn đáp án đúng với câu hỏi: Một ion M 3+ có tổng số hạt proton, nơtron, electron là 79, trong đó số hạt mang điện nhiều hơn số hạt không mang điện là 19. Cấu hình electron của ion M 3+ là
A. [Ar]3d 3 4s 2
B. [Ar]3d 5 4s 1
C. [Ar]3d 5
D. [Ar]3d 4 4s 2 Đáp án là: C. [Ar]3d 5 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tơ capron (nilon-6) được trùng hợp từ
A. caprolactam
B. axit caproic
C. α - amino caproic
D. axit ađipic Đáp án là: A. caprolactam </s> | [
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<s> Chọn đáp án đúng với câu hỏi: In developing centuries, many household depend ______ the use of the natural resources to ensure the food supply or the income required to purchase food.
A. with
B. on
C. in
D. at Đáp án là: B. on </s> | [
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<s> Chọn đáp án đúng với câu hỏi: She wanted ______ home, but her boss made her ______ until the work was finished.
A. to go / staying
B. go / stayed
C. going / to stay
D. to go / stay Đáp án là: D. to go / stay </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Hai este A và B là đồng phân của nhau và đều do axit cacboxylic no, đơn chức và ancol no đơn chức tạo thành. Để xà phòng hóa hoàn toàn 33,3 gam hỗn hợp hai este trên cần vừa đủ 450 ml dung dịch NaOH 1M. Tên gọi của 2 este đó là
A. etyl fomat và... | [
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379,
1794,
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319,
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350,
425,
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2... | [
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<s> Chọn đáp án đúng với câu hỏi: Đẳng thức nào sau đây là hằng đẳng thức?
A. a(a^2 + 1) = a^3 + 1;
B. a^2 + 1 = 2a;
C. (a + 1)(a – 1) = a^2 – 1;
D. (a + 1)^2 = a^2 + 2a – 1. Đáp án là: C. (a + 1)(a – 1) = a^2 – 1; </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong các kết luận sau, tìm kết luận sai:
A. Độ to là một đặc tính sinh lí của âm phụ thuộc vào các đặc tính vật lí là mức cường độ âm và tần số âm.
B. Nhạc âm là những âm có tần số xác định. Tạp âm là những âm không co... | [
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<s> Chọn đáp án đúng với câu hỏi: The authority has postponed......the flyover because it severely affects residents nearby.
A. building
B. to build
C. to building
D. build Đáp án là: A. building </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một ấm điện khi được sử dụng với hiệu điện thế 220V thì dòng điện qua ấm có cường độ là 5A. Biết rằng giá tiền điện là 1500 đồng/kW.h, nếu mỗi ngày sử dụng ấm để đun nước 10 phút, thì trong một tháng (30 ngày) tiền đie... | [
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34... | [
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1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Một hỗn hợp 4,15g chứa Fe và Al tác dụng với 200ml dung dịch C u S O 4 0,525M. Khuấy kỹ để phản ứng xảy ra hoàn toàn. Thu được kết tủa gồm hai kim loại có khối lượng 7,84g. Tìm số mol các kim loại trong hỗn hợp ban đầu.
A. 0,25 mol và... | [
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<s> Chọn đáp án đúng với câu hỏi: Cho 27,68 gam hỗn hợp gồm MgO và Al 2 O 3 trong dung dịch chứa x mol H 2 SO 4 loãng (dư), thu được dung dịch X. Cho dung dịch Ba(OH) 2 1M đến dư vào X, phản ứng được biểu diễn theo đồ thị sau Giá trị của x là
A. 0,90
B. 0,84
C. 0,86
D. 0,88 Đáp án ... | [
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<s> Chọn đáp án đúng với câu hỏi: It is clear from the tone of the passage that the author feels
A. Einstein's work in physics was somewhat tarnished by his conservative political views.
B. Einstein's work in physics, though theoretically impressive, led to few practical applications.
C. Albert Einstein was one of the ... | [
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<s> Chọn đáp án đúng với câu hỏi: X là một α-aminoaxit no chỉ chứa một nhóm –NH 2 và một nhóm –COOH. Cho 13,35 gam X tác dụng với NaOH vừa đủ thu được 16,65 gam muối. Công thức cấu tạo của X là
A. H 2 N-CH 2 CH 2 -COOH.
B. CH 3 -CH(CH 3 )CH(NH 2 )COOH.
C. H 2 N-CH 2 -COOH.
D. CH 3 -CH(N... | [
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<s> Chọn đáp án đúng với câu hỏi: Khi nói về đột biến lệch bội, phát biểu nào sau đây không đúng?
A. Đột biến dị bội có thể phát sinh trong nguyên phân hoặc trong giảm phân
B. Đột biến dị bội chỉ xảy ra ở nhiễm sắc thể thường, không xảy ra ở nhiễm sắc thể... | [
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1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Một quần thể thực vật giao phấn, xét một gen có 2 alen A quy định hoa đỏ trội hoàn toàn so với alen a quy định hoa trắng. Khi quần thể này đang ở trạng thái cân bằng di truyền, số cây hoa đỏ chiếm tỉ lệ 91%. Theo lí thuyết, các cây... | [
1,
1,
29871,
678,
30975,
29876,
29871,
30128,
29976,
29886,
29871,
1715,
29871,
30128,
30030,
865,
325,
31280,
29875,
274,
30057,
29884,
298,
228,
190,
146,
29875,
29901,
4546,
31214,
31500,
29873,
439,
29874,
31500,
30712,
29876,
278,
3150... | [
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Choose the option that best completes the sentences. Lan: ______________ Bảo: She’s very kind. She always offers help to people in need.
A. Does your aunt need to help others?
B. What is your aunt like?
C. How is your aunt like?
D. Is your aunt doing well? Đáp án là: B. What is your a... | [
1,
1,
29871,
678,
30975,
29876,
29871,
30128,
29976,
29886,
29871,
1715,
29871,
30128,
30030,
865,
325,
31280,
29875,
274,
30057,
29884,
298,
228,
190,
146,
29875,
29901,
14542,
852,
278,
2984,
393,
1900,
1614,
2167,
278,
25260,
29889,
18... | [
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Một mạch dao động LC gồm cuộn dây có L = 50mH và tụ điện có C = 5μF. Nếu đoạn mạchcó điện trở thuần R = 10 -2 Ω, thì để duy trì dao động trong mạch luôn có giá trị cực đại của hiệu điện thế giữa hai bản tụ điện là U 0 = 12V. ta pha... | [
1,
1,
29871,
678,
30975,
29876,
29871,
30128,
29976,
29886,
29871,
1715,
29871,
30128,
30030,
865,
325,
31280,
29875,
274,
30057,
29884,
298,
228,
190,
146,
29875,
29901,
4546,
31214,
31500,
29873,
611,
31214,
305,
1146,
29877,
29871,
30128... | [
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Kết quả của phép nhân (−2x^2 + 5x +3)(2x^2 − 3x − 1) là đa thức nào trong các đa thức sau?
A. 4x^4 + 16x^3 − 7x^2 − 14x − 3;
B. −4x^4 + 16x^3 − 7x^2 − 4x − 3;
C. −4x^4 + 16x^3 − 7x^2 − 14x − 3;
D. −4x^4 + 16x^3 − 7x^2 − 14x + 3. Đáp án là: C. −4x^4 + 16x^3 − 7x^2 − 14x − 3; </s> | [
1,
1,
29871,
678,
30975,
29876,
29871,
30128,
29976,
29886,
29871,
1715,
29871,
30128,
30030,
865,
325,
31280,
29875,
274,
30057,
29884,
298,
228,
190,
146,
29875,
29901,
476,
30717,
29873,
439,
30643,
274,
31556,
29874,
1374,
6430,
302,
... | [
1,
1,
1,
1,
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
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1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
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